<button @click="insert">insert at random index</button>
<button @click="reset">reset</button>
<button @click="shuffle">shuffle</button>

<TransitionGroup tag="ul" name="fade" class="container">
  <div v-for="item in items" class="item" :key="item">
    {{ item }}
    <button @click="remove(item)">x</button>
  </div>
</TransitionGroup>
